Measuring instrument or device, in particular for measuring muscle performance



FIG. 1 is a front view of a measuring instrument device, according to this invention;

FIG. 2 is a perspective view;

FIG. 3 is a left side view of the right side view being a mirror image thereof;

FIG. 4 is a top end view thereof;

FIG. 5 is a back view thereof; and,

FIG. 6 is a bottom end view.

The broken lines shown in the circular and rectangular elements on the back of the measuring instrument or device, in particular for measuring muscle performance seen in FIG. 5 are included for the purpose of illustrating a portion of the measuring instrument or device, in particular for measuring muscle performance that forms no part of the claimed design. 

The ornamental design for measuring instrument or device, in particular for measuring muscle performance, as shown and described. 